Seiko Cal. 6640 - 329

The Seiko 6640-329 represents an important milestone in Seiko's 1991 lineup. Powered by the 6640 caliber with 33j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-d52a17ebbe00]

Also known as: Goldfeather, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

33j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1991

Related Models

• Seiko 6252-805
• Seiko 6383-108
• Seiko 3858-957
• Seiko 6674-475
• Seiko 7164-482
• Seiko 6150-566
• Seiko 6186-869
• Seiko 0768-423
• Seiko 5699-721
• Seiko 6626-128
• Seiko 6619-995
• Seiko 5662-122